Core Servers are those which does not utilizes any particular platform for its running and is totally dependent on command line interface. Advantages of the Core Servers are the less complex options in terms of the functionality, Since Server Core installs only the required manageable DHCP, File, DNS, Media Services, and Active Directory server, the requirement of servicing is reduced, therefore there is less attack surface since there is less pressure running on the server, requires less Disk Space which provides greater stability